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<font face="Myriad Pro">Hi Bjoern,<br>
<br>
maybe this one helps:<br>
<br>
\documentclass{article}<br>
\usepackage{pstricks}<br>
\usepackage{pstricks-add}<br>
<br>
\begin{document}<br>
\newcommand{\squircle}[2]{<br>
\psplot[algebraic,plotpoints=200,linecolor=#2]{-#1}{#1}{(#1^4-x^4)^0.25}<br>
\psplot[algebraic,plotpoints=200,linecolor=#2]{-#1}{#1}{-(#1^4-x^4)^0.25}<br>
}<br>
% #1 = radius<br>
% #2 = linecolor<br>
<br>
\begin{pspicture}(-5,-4)(5,4)<br>
\squircle{4}{blue} <br>
\squircle{2}{red} <br>
\squircle{1}{green}<br>
\end{pspicture}<br>
\end{document}<br>
<br>
Regards,<br>
<br>
Juergen<br>
</font><br>
B. Chin-Fo-Sieeuw wrote:
<blockquote cite="mid:f76090385f038.5f038f7609038@student.uva.nl"
type="cite">
<pre wrap="">_______________________________________________
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</pre>
</blockquote>
<br>
<pre class="moz-signature" cols="65">--
Jürgen Gilg
Austr. 59
70376 Stuttgart
-------------------------------------
Tel 0711.59 27 88
e-Mail <a class="moz-txt-link-abbreviated" href="mailto:gilg@acrotex.net">gilg@acrotex.net</a>
Websites <a class="moz-txt-link-abbreviated" href="http://www.acrotex.net">www.acrotex.net</a>
<a class="moz-txt-link-abbreviated" href="http://www.brueckenkurs-physik.de">www.brueckenkurs-physik.de</a>
<a class="moz-txt-link-abbreviated" href="http://www.gilligan-online.de">www.gilligan-online.de</a>
</pre>
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